package shuffle;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Cards {
    private static final String[] suits={"♥","♠","♣","♦"};

    public List<Card> buyCards() {
        List<Card> cardList=new ArrayList<>();
        for(int i=0;i<4;i++) {
            for(int j=1;j<=13;j++) {
                int rank=j;
                String suit=suits[i];
                Card card=new Card(rank,suit);
                cardList.add(card);
            }
        }
        return cardList;
    }

    public void shuffle(List<Card> cardList) {
        Random random=new Random();
        for(int i=cardList.size()-1;i>0;i--) {
            int ranIndex=random.nextInt(i);
            swap(cardList,ranIndex,i);
        }
    }

    public void swap(List<Card> cardList,int i,int j) {
        Card tmp=cardList.get(i);
        cardList.set(i,cardList.get(j));
        cardList.set(j,tmp);
    }

    public void drawCards(List<Card> cardList) {
        List<List<Card>> hands=new ArrayList<>();
        List<Card> hand1=new ArrayList<>();
        List<Card> hand2=new ArrayList<>();
        List<Card> hand3=new ArrayList<>();
        hands.add(hand1);
        hands.add(hand2);
        hands.add(hand3);

        for(int i=0;i<5;i++) {
            for(int j=0;j<3;j++) {
                Card card=cardList.remove(0);
                hands.get(j).add(card);
            }
        }

        System.out.println("第一个人的牌："+hand1);
        System.out.println("第二个人的牌："+hand2);
        System.out.println("第三个人的牌："+hand3);
    }
}
